gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_2.c

   1 /* { dg-do compile { target {{ i?86-*-* x86_64-*-* } && lp64 } } } */
   2 /* { dg-options "-O2 -m64 -fdump-tree-ivopts-details" } */
   3
   4 /* Exit tests 'i < N1' and 'p2 > p_limit2' can be replaced, so
   5  * two ivs i and p2 can be eliminate.  */
   6 long foo(long* p, long* p2, int N1, int N2)
   7 {
   8   int i = 0;
   9   long* p_limit2 = p2 + N2;
  10   long s = 0;
  11   while (i < N1)
  12     {
  13        p++;
  14        p2++;
  15        i++;
  16        if (p2 > p_limit2)
  17          break;
  18        s += (*p);
  19     }
  20
  21   return s;
  22 }
  23
  24 /* { dg-final { scan-tree-dump-times "Replacing" 2 "ivopts"} } */